compatiable and works with are two different things.
xSeries have tiny antennas and they can struggke to couple with some readers (like your door lock)
My Guess for the “best” implant for your lock would be a FlexNT(once you have confirmed the lock is NTAG216 compatiable)
Otherwise a FlexM1
Normally I would suggest a one for one swap, which in this lock, is likely the FlexM1
But performance wise(coupling range), although the FlexM1s are great for their size, the FlexNT is even better
(*****) FlexNT :flexnt: The most underated/ under appreciated implant?
If however you only want an xSeries, then an xMagic would be the one for one then your NExT as a good alternative.
HOWEVER
the coupling will be your issue to contend with. Thats why I suggesed the repeater stickers for you.
But
@TSMC55 has already helped you out with locating the antenna and some expectations.
And from his comments, you might ha e some modifications required
@TSMC55 has the more relevant info about what to expect from your lock, so listen to him over me.
My experience is from my own lock (similar, bit not the same) and mine will only work with a Flex.
Although, I do have some repeaters that I can test with the lock using my xMagic and NExT, BUT i am away from home for another 4 days
What we haven’t discussed is the antenna and how to approach it with an implant.
An xSeries best approach is Perpendicular.
Flex is parallel.
Just bear that in mind when you are doing your testing